EP 1845344 A2 20071017 - Thermal flow meter for an exhaust gas recirculation system
Title (en)
Thermal flow meter for an exhaust gas recirculation system
Title (de)
Thermischer Durchflussmesser für ein Abgasrückführungssystem
Title (fr)
Débitmètre thermique pour un système de recirculation de gaz d'échappement
Publication
Application
Priority
JP 2006110422 A 20060413
Abstract (en)
The invention relates to a high-accuracy EGR sensor, and EGR system which adopts the above sensor to measure EGR rate. The gas flow meter (7) comprises a sensor section for measuring fluid flow rate and controller for controlling signals transmitted into and out of the sensor section, and is controlled at a working temperature of 350 to 700°C, wherein a protective coat (3) formed on the sensor section has resistance to temperature at which deposition of a PM component in exhaust gases can be prevented.
IPC 8 full level
G01F 1/688 (2006.01); F02D 41/18 (2006.01); G01F 15/00 (2006.01)
CPC (source: EP US)
G01F 1/684 (2013.01 - EP US); G01F 1/688 (2013.01 - EP US); G01F 15/006 (2013.01 - EP US)
Citation (applicant)
- JP H02114126 A 19900426 - HITACHI LTD, et al
- JP H05273020 A 19931022
- JP 2003163105 A 20030606 - HITACHI LTD
- JP S59104513 A 19840616 - HITACHI LTD
- JP 2002013960 A 20020118 - HERAEUS ELECTRO NITE INT
- EP 1835267 A2 20070919 - HITACHI LTD [JP]
Designated contracting state (EPC)
DE FR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1845344 A2 20071017; EP 1845344 A3 20090211; JP 2007285738 A 20071101; JP 5010845 B2 20120829; US 2007245822 A1 20071025; US 7526955 B2 20090505
DOCDB simple family (application)
EP 07007641 A 20070413; JP 2006110422 A 20060413; US 73445507 A 20070412